USB charger



FIG. 1 is a front isometric view of an USB charger showing our new design;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a front side view thereof;

FIG. 4 is a rear side view thereof;

FIG. 5 is a top side view thereof;

FIG. 6 is a bottom side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a left side view thereof.

The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. All other broken lines in the figures show portions of the USB charger for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for an USB charger, as shown and described. 